Re: [PATCH net-next v4] rtnetlink: Support fine-grained netdevice bulk deletion

On 12/5/21 6:49 AM, Ido Schimmel wrote:

In your specific case, it is quite useless for the kernel to generate
16k notifications when moving the netdevs to a group since the entire
reason they are moved to a group is so that they could be deleted in a
batch.

I assume that there are other use cases where having the kernel suppress
notifications can be useful. Did you consider adding such a flag to the
request? I think such a mechanism is more generic/useful than an ad-hoc
API to delete a list of netdevs and should allow you to utilize the
existing group deletion mechanism.

I do agree that we do not want to allow netdev changes without userspace
notifications.

It would be nice to re-use the group delete API, but really there is no
guaranteed, reserved group value that can be used for a temp assignment
and to then use the group delete call.